Nikon S600 IQ ???

I was wanting to know if anyone can say exactly how good the IQ of the Nikon S600 camera is. I have a D300, P5100, and a Pentax Optio A30 that I may replace with the S600. The A30 is a great little camera. It is fast, with virtually no shutter lag. Less than the S600 I have read. It also has a bigger sensor. To me it just over saturates colors wich Nikon does not, and Nikon has got the right idea about how to handle noise. From pictures I have seen, The S600 is better at ISO 800 and up than my A30 is even though it has the smaller sensor and they are both 10 pixels. I am happy with how the Pentax IQ looks at 100 to 400 and am just curious exactly how good the S600 is with the smaller sensor. Anyone happen to have a P5000/5100 and an S600 to compare ? Many thanks.